Group 1 - The core index of the China Securities Index for private high-end equipment has shown a monthly increase of 4.98%, a three-month increase of 4.56%, and a year-to-date increase of 13.08% [1] - The index includes 50 private enterprises involved in sectors such as aviation, aerospace, shipbuilding, and satellites, reflecting the overall performance of these companies [1] - The index's top ten weighted companies include Guangqi Technology (9.43%), Ruichuang Micro-Nano (5.45%), and Lianchuang Optoelectronics (4.76%) [1] Group 2 - The industry composition of the index shows that industrial companies account for 58.37%, information technology for 20.64%, materials for 13.03%, and communication services for 7.96% [2] - The index samples are adjusted biannually, with adjustments occurring on the next trading day after the second Friday of June and December [2] - In special circumstances, the index may undergo temporary adjustments, such as when a sample company is delisted or undergoes mergers and acquisitions [2]